Harriet Marsden has spent over a decade working as a nutrition specialist in private practice, during which she developed a steady interest in how everyday people — not competitive athletes or extreme dieters — navigate choices around food, movement, and the balance between them.
Darnev Letters began as a private notebook in 2022, a place to record observations from consultations, personal experiments with seasonal cooking, and a growing archive of research on nutritionist guidance, weight management, and the role of sport and fitness in sustaining long-term eating patterns.
The publication opened to readers in 2025, edited by Harriet with contributions from two regular writers: Tobias Renshaw, who covers meal planning and whole foods, and Imogen Beaumont, who focuses on the intersection of active lifestyle and everyday nutrition.